Finding
electrical alternans
Definitions related to electrical alternans:
  • The QRS complexes of the electrocardiogram alternate in height.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • (electrical alternans by ecg finding) An electrocardiographic finding in which there is an alternating pattern of any of the waveform components.
    NCI
    U.S. National Cancer Institute, 2021
  • Electrical alternans is a broad term that describes alternate-beat variation in the direction, amplitude, and duration of any component of the ECG waveform (ie, P, PR, QRS, R-R, ST, T, U). It was first recognized by Hearing in 1909 and further characterized by Sir Thomas Lewis in 1910 as occurring
    Medscape
    WebMD, 2025
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